Would you please tell me _____ you know is good at typing?

A. whom B. whomever

C. whose D. whoever

If the dog hadn’t woken us, we wouldn’t have noticed the fire and it _____ to the house next door.

A. could spread B. should have spread

C. would spread D. might have spread

---Zhangjiajie is worth visiting. I there with my parents during the holidays.

---I agree. I have been there twice.

A. went B. have gone

C. have been D. am going

in the fields on a March afternoon, he could feel the warmth of spring.

A. To walk B. Walking

C. Walked D. Walk

It's 5 days we came here. Why shouldn't we start?

A. when B. before C. as D. since

They've won their last three matches, I find a bit surprising.

A. which B. that C. when D. what

With temperature ______ so rapidly, we could not go with the experiment.

A. fall B. falling

C. fallen D. to fall

our earth, or else it will be no longer fit for us to live on.

A. Protected B. To protect

C. Protecting D. Protect

Earth is believed ______ by an object the size of Mars at some point in the distant past before its

surface cooled.

A. to be hit B. to have hit

C. to have been hit D. to hit

At minus 130℃, a living cell can be _________ for a thousand year.

A. spared B. protected

C. preserved D. developed