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用句中劃線單詞的適當形式填空

The professor is ______ (dip) （浸） one finger into the cup now.

I have a few questions ______ (ask).

Cotton ______ (feel) very soft.

The young man over there ______ be at least twenty-five years old.

Please fill the bottle with ______ (milk).

用情態(tài)動詞（can, may, must, need, have to, be able to）的正確形式填空：

The red light is on. We ______ stop.

用情態(tài)動詞（can, may, must, need, have to, be able to）的正確形式填空：

We'll ______ finish it in time.

You ______ drink this, it isn't clean enough.

用所給單詞的適當形式填空