How long do you suppose it is ___________ he arrived there?

Could you give me _____ on how to learn English well– Sure.

I hear Xiao Ming made an English speech at the graduation ceremony yesterday.—_______, and _______.

You never know how much difficulty we had the problem. Luckily, we managed to solve it with Mrs Wu’s help.

I’m amazed to hear from my school teacher again．，it is ten years since we met last．