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
 I’m glad to see your health ______ after the operation.
#105301
A
picking up
B
setting up
C
taking up
D
getting up
let’s go out now. It _____ any more. 
#105337
A
didn’t rain
B
doesn’t rain
C
won’t rain
D
isn’t raining
5.―Have you handed in your schoolwork yet?  ―Yes,I have. I guess it ____ now. 
#105340
A
has graded
B
is graded
C
is being graded
D
is grading
— ________ for the glass! —It’s OK. I’m wearing shoes. 
#105336
A
Look out
B
Walk out
C
Go out
D
get out