In order to sustain a snowfall, there must be__________to feed the growing ice crystals.
B. a constant inflow of moisture is
Câu đề bài: Để duy trì việc tuyết rơi, cần phải có một dòng chảy liên tục của độ ẩm để cung cấp sự gia tăng các tinh thể nước đá.
Cấu trúc: There + be + something + to do something: cần có cái gì đề làm gì.
Chọn D
Smoking is extremely detrimental to health, _____ many people continue to smoke anyway.
Many years ago, black children were _____________ to discrimination in many schools.
The authorities recommend that the meeting _____________ next Monday.
Her husband is very kind. He always cares _____ her and never puts all of the housework her.
As a small boy, he used to _______ alone in the house for an hour or two.
Anna thinks she ought to go to the university, _______ she wants to get qualifications for her dream job.
The archaeological excavation _____ to the discovery of the ancient city lasted several years.