At the party, she ________a ghost.
| A．dresses up | B．dresses up as |
| C．dresses up in | D．dresses up like |
He found_ ________very difficult ________the math problem．
| A．that, to solve | B．this, solving |
| C．it, to solve | D．it, solving |
— What did Tina say? — Sorry, I didn’t ________ what she said.
| A．pay attention to | B．get on with |
| C．hold on to | D．look forward to |
—Do you know _____ ? I'm going to see him. —Sorry, I don't know.
| A．where does Mr. Li live | B．where did Mr. Li live |
| C．where Mr. Li lives | D．where Mr. Li lived |
I often make mistakes ___________ grammar..
| A．by | B．through | C．across | D．in |