All of us will be happy ________ you can come with us.

A. while

B. if

C. but

D. or

?How do you like the two pairs of shoes?

?They don't fit me well. They are ________ too big ________ too small.

A. not only; but also

B. both; and

C. neither; nor

D. either; or

It's raining heavily ________ the farmers keep on working in the field.

A. but

B. though

C. till

D. because

________ you ________ he is able to ski, but I am.

A. Neither; nor

B. Not only; but also

C. Either; or

D. Both; and

________ Lily ________ Lucy may go with you because one of them must stay at home.

A. Not only; but also

B. Neither; nor

C. Both; and

D. Either; or

Miss Zhao is very helpful. She often helps us ________ we are in trouble.

A. whether

B. although

C. whenever

D. however

He was so tired that he fell asleep ________ he went to bed.

A. as if

B. even though

C. ever since

D. as soon as

The doctors tried their best to save the patient's life, ________ failed.

A. or

B. so

C. but

D. because

When you're learning English, use it, ________ , you'll lose it.

A. but

B. or

C. then

D. and

?Would you like to go to the concert with me?

?I'd love to, ________ I can't. I have a lot of homework to do.

A. or

B. but

C. so

D. and