28. Think after you read ____.
| A．which words do you need to look up | B．you need to look up which words |
| C．which words need you look up | D．which words you need to look up |
— Sorry, I forget to post the letter for you.
— Never mind, ＿＿ it myself tonight.
| A．I’m going to post | B．I’ve decided to post | C．I’ll post | D．I’d rather post |
— What were you up to when your parents came in?
— I＿＿for a while and＿＿some reading.
| A．was playing； was going to do | B．played； did |
| C．had played； was going to do | D．had played； did |
— Remember the first time we met, Jim?
— Of course I do. You ＿＿ in the library.
| A．were reading | B．had read | C．have read | D．read |
The vegetables didn’t taste very good. They＿＿too long.
| A．had been cooked | B．were cooked | C．had cooked | D．cooked |
— Was the driving pleasant when you went to Mexico last summer?
— No, it ＿＿ for four days when we arrived, so the roads were very muddy.
| A．was raining | B．had been raining | C．would be raining | D．rained |