13. number/ Vietnamese student/ study/ overseas/ increase/ considerable/. A. The number of Vietnamese students studying overseas has increased considerably. B. Number of Vietnamese students to study overseas has increased considerably. C. The number of Vietnamese students study overseas has increased considerable. D. The number of Vietnamese students studying overseas have increased considerable. 14. read/ newspaper/ morning/ give/ he/ please/. A. Read newspapers in the morning gives he please. B. Reading newspapers in the morning gives him pleasure. C. Reading newspapers on the morning will give him pleased. D. To read newspapers in the morning give him please 15. fortunate/,/ biogas/ not/ total/ harmful/ people/. A. Fortunately, biogas is not total harmful for people. B. Fortunately, biogas is not totally harmful to people. C. Fortunately, biogas is not totally harmful with people. D. Fortunate, biogas is not totally harmful of people. 16. we/ should/ think/ positive/ how/ protect/ environment/. A. We should think positively how to protecting our environment. B. We should think positive how protecting our environment. C. We should think positively how to protect our environment. D. We should think positive how to protect our environment. 1. My grandpa/ recover/ quickly/ his serious illness/. A. My grandpa was recovered very quickly from his serious illness. B. My grandpa has recovered quite quickly from his serious illness. C. My grandpa will recover quite quickly after his serious illness. D. My grandpa recovered more quickly over his serious illness. 2. hilltop/ have/ good/ view/ our village/. A. The hilltop can make our village views better. B. From the hilltop, our village can viewed very well. C. From the hilltop, we can have a better view of our village. D. From the hilltop, our village can have a better view. 3. museum/ small/ have/ a lot of/ unique artifacts/. A. This museum is small, but it has a lot of unique artifacts. B. This museum is small because it has a lot of unique artifacts. C. That museum is both small and has a lot of unique artifacts. D. Being small, this museum has a lot of unique artifacts. 4. disappointed/ film/ entertaining/ expected/. A. We were disappointed as the film was more entertaining than we expected. B. We felt disappointed as the film was less entertaining than we had expected. C. We felt disappointed just because the film was entertaining as we expected. D. We were disappointed, so the film was more entertaining than we had expected. 7. In/ past/ most/ girls/ like/ knit/ sweaters/ themselves/. A. In the past most girls like to knit sweaters for themselves. B. In the past most girls liked knitting sweaters for themselves. C. In the past most girls liked to knitting sweaters for themselves. D. In the past most girls like knitting sweaters for themselves.