—Yesterday we learnt the fifth, ________？
—I'm sorry, Mr. Li. I don't understand everything.
| A．didn't you | B．have you got it |
| C．do you think so | D．how about |
He is the first person you can think of to rely on, for he is always willing to ________ whoever is in trouble.
| A．cut out | B．figure out | C．test out | D．help out |
—Why do you look so worried?
| A．had left | B．has left | C．was left | D．has been left |
It won’t be quite a long time ________ your son is back, so don’t be worried.
| A．that | B．since | C．before | D．until |
—What's the matter with the man hanging his head there?
—Well，if you ________ know, he was caught stealing my bike.
| A．must | B．may | C．can | D．shall |
GM, Chrysler and Ford expressed their desire that they ________ in want of a $25 billion government aid to pull through the financial crisis.
| A．were | B．would be | C．be | D．ought to be |