Putting out forest fire is regarded as one of ___________ problems in the world.
A.difficult B.more difficult C.most difficult D.the most difficult
—Susan, there is ___________ rice and ___________ noodles at home. Will you go shopping with me?
—Sorry, I have to wait for the postman.
A.little; few B.few; little C.a few; little D.few; a little
--You have got lots of masks. Could you please tell me ___________?
--Sure. I bought them in a shop in the neighborhood a few days ago.
A.when did you buy them B.where you bought them
C.when will you buy them D.where you will buy them
On January 29th, 2020, Zhong Nanshan and his team ___________ over four hours online ___________ five patients who were seriously ill, and made a treatment plan for those patients.
A.spent; checking B.spent; to check C.spend; checking D.spend; to check
--- Is that Mary over there?
--- It ___________be her. She has gone to Kunming.
A.may B.must C.can't D.mustn't
--It's 20 years since we came back to Liangshan.
--How time flies! We ___________ in our hometown for such a long time.
A.work B.worked C.has worked D.have worked
