Thanks ______a photo my family . They are very nice. A. to of B. in for C. for of
You never know how much difficulty we had _____ the problem. Luckily, we managed to solve it with Mrs Wu’s help
----Has Jack finished painting the picture yet? ---- I’ve no idea. But he______ it the whole afternoon.
----The light in the room is still on. Do you know_______? ----In order to prepare for the coming exam.
Xiao Zhang has ______homework every day and she really doesn’t know ______ first.
If you keep on working hard, I have no doubt ______ you will be successful in the future.