It’s said that the famous scientist will give us _________advice on maths study. —__________good news! I’m not good at it.

I’m afraid I won’t come _____ 7 and 9. I will be at work then. [ ]

Mr. Li, let’s go fishing this weekend with Lao Wang, shall we?—I’d love to, but nobody knows if he _______ free then.

Which girl is your sister? —- The girl ___________is wearing dark glasses.

______, he can speak three foreign languages fluently.