Question

We have made such great progress _________your help.

A. because
B. because of
C. thank to
D. as a result

Answer 1

答案B
because是连词，后面须接一个从句，而because of/thanks to/as a result of是介词短语，后面接名词／代词／名词性短语。该句的意思是：由于你的帮助，我们才取得了这么大的进步。