New medicines and instruments ______ every day to extend life.
#105334
A
develop
B
are being developed
C
are developing
D
have developed
推荐题目
----what do you think of the Chinese language today?----Quite popular. It______ in communicating with other countries. More and more foreign friends are learning Chinese.
#105332
A
plays an important role
B
is playing an important role
C
has played an important role
D
is being played an important role
— ________ for the glass! —It’s OK. I’m wearing shoes. 
#105336
A
Look out
B
Walk out
C
Go out
D
get out
 My money ________.I must go to the bank to draw some of my savings outbefore I've none in hand.
#105320
A
has run out
B
is running out
C
has been run out
D
is being run out
5.---Have you handed in your schoolwork yet?  ---Yes,I have. I guess it ____ now. 
#105345
A
has graded
B
is graded
C
is being graded
D
is grading