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表演出來________

做同一件事________

裝一匙子玉米粉________

邀請某人做某事________

……的對立面__________

We should stop the factory from _____ 　　  water 　　   the lake（向湖中排放廢水）.

He ________（解釋）to us again and again and at last we understood.

We _____ 　　   　　   　　  （為……做準備）the test now.

He put ________（一茶匙）cornstarch into the bowl.

We ________（感到驚奇）at what he said just now.