You can’t imagine ______ little ants can carry ______ heavy a thing.— That’s what we should learn from ants.

Last summer I took a course on______.

To the teacher’s surprise, the boy had no ____ out the ____ maths problem. [ ]

When we arrived in the middle of the night，there was no food as all the shops were shut.

Loulan City is not at all ________ a traveler who has never seen the desert before can expect