`1`. B to seeing ( look forward to + Ving: mong chờ )

`2`. C risk climbing ( let + SO + Vinf: cho phép, risk + Ving )

`3`. C buying him a book ( remember + Ving: nhớ đã làm việc gì, buy + SO + ST )

`4`. B to send ( remember + to V: nhớ việc cần làm )

`5`. C doing ( suggest + VIng: gợi ý )

`6`. C opening ( Would you mind + Ving: Bạn có phiền khi ...... không? )

`7`. C smoking ( give up + Ving: từ bỏ )

`8`. B to have ( stop + to V: dừng để làm việc gì )

`9`. D smoking ( stop + Ving: dừng hẳn )

`10`. C discovering ( prevent + SO + from Ving )

`11`. B to smoke ( allow + SO + to V: cho phép )

`12`. C enetering ( allow + Ving: cho phép )

`13`. A stay ( had better = should + Vinf: nên )

`14`. A. B and C are correct ( need + Ving/ to be Vpp: mang nghĩa bị động )

`15`. A laughing ( couldn't help + Ving )

`16`. C to buy ( to V: chỉ mục đích )

`17`. C to stay ( S + be + adj + for SO + to V )

`18`. A doing ( from + Ving )

`19`. D all are correct ( help + SO + Vinf/ to V/ with ST )

`20`. B to finish - writing ( manage + to V, finish + Ving )

`21`. B me to come ( want + SO + to V: muốn )

đáp án ( cho mk xin 5 sao + trlhaynhat nhé)