----- Nội dung dịch tự động từ ảnh -----
IV. Fill each gap of the following sentences with a suitable preposition.
16. They often play catch
17. We could go
recess.
the trip because we could afford it.
18. I haven't been able to concentrate recently
it is.
19. The plane couldn't take
20. My grandfather was able to walk
work. I don't know what
at eleven o'clock, after the fog had lifted.
any help last night.
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