This kind of stone _____ cool in summer and warm in winter.
A. is being felt B. is felt C. feels D has been felt
--Shall Mary come and play computer games?
--No, __________ she has finished her homework.
| A．when | B．if | C．unless | D．once |
--I'm sorry, I shouldn't have been so rude to you.
--You___________ your temper but that's OK.
| A．have lost | B．had lost | C．did lose | D．were losing |
Whether ways will be found to stop pollution or not is just___________ worries the public.
| A．why | B．which | C．that | D．what |
I've visited a lot of different places and stayed in lots of different hotels, but none of them___________ this one.
| A．makes | B．beats | C．compares | D．matches |
O'Neal works hard. He is often seen _______ heavily before his teammates have even arrived at practice.
| A．sweated | B．to be sweated |
| C．sweating | D．being sweated |