Look at the street, it's very muddy. It ____ rained ...

★ Gerund, Infinitive & Modals

Look at the street, it’s very muddy. It ____ rained last night.

A. could

B. might be

C. would have

D. shall be

E. must have

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Healthy food ____ on your diet or you will become fat.

A. should be added

B. would be added

C. could be added

D. must be added

E. might be added