It is reported that in our country cities ________ heavy air pollution that is 30 percent above the national standard or higher should try to meet standards by 2030.
#13946
A
suffering
B
suffer
C
suffered
D
are suffering
推荐题目
Let’s ________ the radio and see what’s wrong with it.
#11789
A
take apart
B
take off
C
take down
D
take up
The government has decided to _____ those shabby old buildings so as to make way for the new and wide street ___ the beautiful West Lake. 
#13237
A
pull down; leading to
B
knock down; leads to
C
knock down; that leading to
D
knock off; leading to
 He comes here on Mondays, Wednesdays and Fridays — ________, to be exact.
#13359
A
every second days
B
every other days
C
every other day
D
every two day