The scientists are beating their brains trying to _______ a solution to the problem.
A．come about B．come across C．come out D．come up with
It was _______ back home after the experiment.
A．not until midnight did he go
B．until midnight that he didn’t go
C．not until midnight that he went
D．until midnight when he didn’t go
With the price of pork and eggs _______ quickly, CPI has become a hot phrase among Chinese.
A．raising B．going up C．to raise D．to go up
To improve the quality of our products, we asked for suggestions _______ had used the product.
A．no matter who B．who C．whoever D．whichever
With more forests being destroyed in that area, huge quantities of land _______ deserts each year.
A．has been turned into B．had been turned into
C．is being turned into D．are being turned into
—Excuse me sir, where is the room 301?
—Just a minute. I’ll get Bob _______ you to your room.
A．show B．shown C．to show D．showing
