问题

______ the sound on the step, the boy rushed out tosee if his mother had come back.

A:To hear
B:Hearing
C:Heard
D:Hear

正确答案是：

同类题型

May I go now?—__________ you’ve finished your work, you may go

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和词汇知识从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。6. _________ the website of our school, andyou ‘ll get loads of information on how to get ready for the college life.

If we __________ computers, life __________ very different now.

Which of the following is an opinion ___________________________