答案：D测试点：介词+which结构／不定式。分析：介词+which后

答案：D测试点：介词+which结构／不定式。分析：介词+which后面可接从句，亦可接不定式结构，即介词+which+to do。

Kết quả (Anh) 1:

Answer: d test points:/infinitive preposition +which structure. Analysis: behind the preposition +which to inform that, infinitive construction, the preposition +which+to do.

Kết quả (Anh) 2:

Answer: D test point: preposition + which structure / infinitive. Analysis: preposition + which can be accessed behind the clause, also infinitive structure that preposition + which + to do.

Kết quả (Anh) 3:

Answer: D test point: the structure of the preposition which / No. Analysis: preposition which followed by the following clauses, can also be connected to the structure, that is, the preposition to do which.