II. Choose A, B, C, D for each gap in the following sentences. 1. Facebook _______ on the success of earlier social network sites like MySpace and Bebo. A. was built B. built C. builds D. is built 2. It is thought that driverless cars will transform the way we move ______ cities in the future. A. around B. away C. along D. ahead 3. During a long drought, farmers had to ______ way to save their crops. A. find B. found C. finding D. see 4. If you ______ a doctor, what would you do to help the sick? A. are B. had been C. was D. were 5. Last night, Mai ______ Math before she prepared the new lessons. A. had done B. did C. has done D. was done 6. Solar energy _________ to solve the problem of energy shortage. A. use B. will use C. will be used D. will be using 7. Lan ______ a Maths lesson at 8 a.m tomorrow. A. is having B. are having C. will having D. will be having 8 .If she _______ a teacher, what would she do to help students ? A.are B.had been C.were D.is