The man was so funny that Amy couldn’t help_____.
A. laughs B. laughing C. to laugh
--Would you like to ride bicycles with us tomorrow?
--Yes, I’ll go_____ I’m free.
A. because B. when C. if
The old man warned us_____ here, it’s dangerous.
A. swim B. not to swim C. not swim
Tom used to_____ up late, but now he gets used to _____ up early and do some exercise in the morning.
A. get; to get B. getting; get C. get; getting
Michael was watching TV_____ his father came in.
A. when B. while C. as soon as
--I heard the high-speed train between Beijing and Tianjin ran_____ 350 kilometers a hour.
--That’s right. I’m looking forward to _____it one day.
A. at; take B. at; taking C. by; take
