With the help of high technology, many new substances（物质）______in the past years.
#102927
A
discovered
B
have discovered
C
had been discovered
D
have been discovered
推荐题目
Why don’t you put the meat in the fridge? It will ________ fresh for several days.
#104753
A
be stayed
B
stay
C
be staying
D
have stayed
Around two o’clock every night, Sue will start talking in her dream. It somewhat ________ us.
#100593
A
bothers
B
had bothered
C
would bother
D
bothered
—The movie Till Death Do Us Part 《最爱》will be on at 8 pm．What about picking you up at 7pm?—All right．I will have come back from work by then, and I you at home．
#102688
A
will be waiting for
B
will wait for
C
have been waiting for
D
am waiting for
When you ______with the dictionary, don’t forget to put it back on my desk, will you?
#101912
A
will finish
B
are finishing
C
will have finished
D
have finished