—We all had a lot of fun at the barbecue yesterday．Pity you weren’t there.
—I really should have gone with you but I _____ on some remaining problems.
| A．worked | B．was working |
| C．would work | D．would have worked |
-- 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 |
A much better way, as the press reveals, must be found to achieve an equal ________ of the resources.
| A．distribution | B．contribution |
| C．location | D．separation |
-- I wonder if you could go with me to the supermarket.
-- Don’t disturb me. I ________ my daily report this morning and haven’t finished yet.
| A．write | B．was writing |
| C．have written | D．have been writing |