Floods in the upper reach of the River Nile ________ the rich soil in this area.

Jane is the only one of the girls who ______ playing football in her class.[ ]

I thought it was _____ to donate money to this fund. [ ]

I’m afraid I can’t return your book by Friday.-________. There is no need to return it hurriedly.[ ]

He often practices English chattingwith his pen pal in Australia.