Instruction

Select the best answer to complete the sentence.

1. The new smart phones are expected to account for -------- 20 percent of the entire market.

2. He seems to be -------- busy working to take a break.

3. I don’t know -------- to apologize to you.

4. ------- the textbook, the Kamakura Shogunate was overthrown in 1333.

5. We will wait here until Tim --------.

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