You’d better cut your hair short. Our school doesn’t __________ long hair.
| A．approve of students wearing | B．approve students to wear |
| C．approve students wearing | D．approve of students to wear |
-- Shall we take a taxi there since time is limited?
-- ________. It should be hard to get one during the rush hour.
| A．Go ahead | B．Don’t mention it |
| C．No doubt | D．Just forget it |
Traveling without ordering rooms in advance can eat up precious vacation time ________luck is smiling on you.
| A．unless | B．as | C．if | D．when |
-- It’s more convenient to take a subway than drive a private car.
-- ________. What’s more, it’s also a good way to support the low-carbon lifestyle.
| A．Quite so | B．So is it |
| C．By all means | D．All right |
It is known to all that the US is about the same size as China, whereas its population is five times________.
| A．as few | B．fewer |
| C．as little | D．smaller |
Three days after the aircraft went missing, an international effort ________ ships and planes hasn't found any wreckage, ________ growing frustration for the families of the 239 people on board.
| A．involved; causing | B．to involve; caused |
| C．involving; causing | D．involving; having caused |