Instruction

Select the best answer to complete the sentence.

1. How about -------- to the amusement park tomorrow?

2. -------- this machine, we can do that difficult task.

3. I couldn’t help -------- at his jokes.

4. The number of department staff was doubled to deal with the system trouble caused ------- large-scale blackout.

5. Mrs. Moehring was busy -------- care of her granddaughter when I called her.

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