There _____ many animals in that zoo.
| A．used to | B．used | C．used to have | D．used to be |
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--It’s so hot here. Do you mind ____________ the window?
---____________. I will do it right now.
| A．to close; Yes |
| B．to open; No |
| C．opening; Of course not |
| D．closing; You’d better not |
My computer broke down, but I am not clear ___________________.
| A．how to do with it | B．what to do with it |
| C．how should I do it | D．what should I do |
--- What do you think of what I said?
--- Sorry. I _____ about something else.
| A．am thinking | B．was thinking |
| C．thought | D．thinks |
---Why not stop __________ a rest?
--- Oh, it’s so exciting that I can’t stop ____________ the model plane.
| A．having; making | B．to have; to make |
| C．having; to make | D．to have; making |