_____ your help, we _____ complete the work in time.
A．Thanks to; were able toB．Thanks to; could
C．As; wouldD．Because; had to
A
thanks to相當于because of,此短語可放在句首或句尾，to是介詞，后接名詞、代詞或動名詞，而as或because后接的是從句，因此排除C、D，其次，當表示過去有能力并實際上成功地做到某事，要用“was/were able to”不用could，沒有做到可用couldn’t或wasn’t/weren’t able to.
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