发帖
雷达卡
Structures
Unit 1
Revising useful structures--- Infinitives
Exercise
He discovered how ___________ the door. (open)2. I found out where __________ fruit cheaply. (buy)3. I didn’t know when __________ the machine off. (switch)4. I showed her which button __________. (press)5. She couldn’t think what _________.(say)
to open
to buy
to switch
to press
to say
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