Max got lost and was trapped in the forest for 10 hours _______ a farmer nearby found him．（ ）
A．ifB．sinceC．untilD．after
Have you returned the book to the library yet？
Not yet．Don't worry．I ______it soon．（ ）
A．returnB．returned
C．have returnedD．will return
I really want to join the square dance．Can I learn the dance well？
Yes，Mom!Nothing is impossible______you put your heart into it!（ ）
A．as long asB．as soon as
C．even ifD．unless
Don't ______late．Betty．You have to go to school early tomorrow．
OK，Mom．I'll go to bed right now．（ ）
A．put upB．stay upC．sit downD．fall down
If your partents wanted to have a _____child，would you agree？
Of course．But they should make it in ______year's time．（ ）
A．second；secondB．two；two
C．second；twoD．two；second
Let's go climbing，shall we？
You _____ be joking!Don't you know I'm afraid of high places？（ ）
A．mayB．canC．mustD．should