. -Tommy, do you know if Frank ______ to the theatre with us this Sunday if it ______?
-Sorry, I have no idea.

.They were all so tired that they could ______.

Several days has passed_______the air crash（空难） happened.
A.since                  B.after                C.as

—Do you like playing tennis?
—No， ____ I like sports．I play football every Sunday

____ it snowed heavily yesterday, nobody in our class missed the lesson．

—Why didn’t Betty come to school yesterday?
—_________ she was ill.

Bob is young, _______ he knows a lot.

Maybe I’m not very healthy, ___ I have healthy habits.   

It’s a nice house, _______ it doesn’t have a garden.
A. and                  B. or                    C. but

I wanted to explain,           she didn’t give me any chance.
A. and                                 B. but                            C. so