smooth
| A．youth | B．strength | C．thunder | D．worthy |
How cold it is ! We’ve never had ________this winter.
| A．the colder day | B．a cold day |
| C．the coldest day | D．a colder day |
It was at the very beginning ______ Mr Smith made a decision _____we should send for a doctor.
| A．when; which | B．that; which |
| C．when; that | D．that; that |
——I’m afraid I can’t finish the magazine within the required time.
——__________.
| A．Please go ahead | B．That’s right |
| C．Not at all | D．Take your time |
—Excuse me, Professor Smith, I was wondering if I could leave a quarter earlier today.
— _____ .
| A．Nothing the matter. | B．Sure, go ahead |
| C．Oh, why not? | D．Of course, no problem. |
Green products are becoming more and more popular because they are environmentally _________.
| A．friendly | B．various | C．common | D．changeable |