—Jane，they didn’t invite us to the party.
—________I don’t care.
| A．How come? | B．So what? |
| C．What for? | D．What if? |
When asked why he went there,he said he was sent there___for a space flight.
| A．training | B．being trained |
| C．to have trained | D．to be trained |
Scientists are convinced___the positive effect of laughter___physical and mental health.（）
| A． | of;at | B． | by;in |
| C． | of;on | D． | on;at |
Don’t take too much of the medicine;it does you more harm than good if you______.
| A．do | B．take |
| C．like | D．have |
—Will you join us in the game?
—Thank you,_______
| A．but why not? | B．but I’d rather not. |
| C．and I won’t. | D．and I’ll join. |
He was down with the flu, and ____ couldn’t come to the party.
| A．moreover | B．meanwhile | C．therefore | D．otherwise |