If you keep learning English for half an hour each day,your English will be gradually improved.( )
at least
at present
at once
at first
I study for a test ___________ working with a group.
-- How does John usually go to school? --- He ________ ride a bike, but now he ________ there.
---This pair of shoes ____ belong to Jack. He likes this kind very much. --- It ____ be his. It’s too large for him.
We are trying to help those children _____ lost their parents in Yushu, Qinghai Province.
Flowers____________ along the road last year.