---How often do I need to feed the birds?---They______ food every day, or they will be hungry.

---How often do I need to feed the birds?---They______ food every day, or they will be hungry.

#44408

must give

mustn’t give

must be given

mustn’t be given

推荐题目

The children ______ not to play with the fire.

#45047

are often told　

tell　

are telling　

told

It’s said that ______of the water around the world___ polluted.

#44439

two third , has

two thirds, have

two third, are

two thirds, is

------ Did you win the volleyball game ? ------ Bad luck. Our team ________ in the final one.

#44737

won

beat

was won

was beaten

Stamps ______ sending letters.

#45020

used to

are used to

are used for

are using

Many accidents ______ by careless drivers last year.

#44988

are caused

were caused

have caused

will cause

共461题