He was often seen _________ with charity work last year.
#44620
A
to help
B
helped
C
helping
D
help
推荐题目
The classroom every day.
#44450
A
should clean
B
should be cleaned
C
should cleaned
D
should be cleaning
---How often do I need to feed the birds?---They______ food every day, or they will be hungry.
#44408
A
must give
B
mustn’t give
C
must be given
D
mustn’t be given
Every year lots of trees ____________ to make our country more beautiful.
#44817
A
is planted
B
was planted
C
are planted
D
were planted
— Food problem is becoming a big one in China! —I think the food ________ before going to shops or supermarkets.
#44566
A
is checked
B
is checking
C
should be checked
D
should check