Visitors ________ not to touch the exhibits.
#99747
A
will request
B
are requested
C
are requesting
D
request
推荐题目
Put on your coat! I _________ you down to the doctor.
#100216
A
have been taking
B
am taking
C
took
D
have taken
 The baby is generally healthy, but every now and then he ______ a cold.
#104089
A
has caught
B
is catching
C
will catch
D
does catch
I wonder why Jenny ________ us recently. We should have heard from her by now. 
#104779
A
hasn’t written
B
doesn’t write
C
won’t write
D
hadn’t written
Many British people have noticed that butterflies _______ from its natural habitats during the past several years.
#102940
A
are disappearing
B
have been disappeared
C
have been disappearing
D
will have disappeared
All the essays _____________, the teacher sent the students home.
#102948
A
having written and collected
B
having been written and collected
C
being written and collected
D
to be written and collected