With the help of high technology, more and more new substances _____

 With the help of high technology, more and more new substances ______ in the past years.

#104082

discovered

have discovered

had been discovered

have been discovered

推荐题目

—— Did you hand in your application for a league member?——Not yet. If I _____to see my father, I would have.

#103039

didn’t go

haven’t gone

wouldn’t have gone

hadn’t gone

I __________ glasses since I was in primary school and I hate them. They make me look like a bookworm.

#102386

have worn

have been wearing

have been worn

was wearing

—How was the journey?—Tiring! I caught the train at the last second but all the seats _____．I stood all the way．

#101625

would occupy

had occupied

had been occupied

would be occupied

— What do you want for breakfast, Joe? — I think I _______ some bread and milk.

#99657

will have

am going to have

had

am having

---I am going to Beijing during the coming summer holiday.--- Great ! You ______about our capital well then.

#100640

will be knowing

will have known

have known

have been knowing

共5993题