—______ I smoke here?
—No. You are not allowed to smoke in public places.
| A．Could | B．Must | C．Should | D．Might |
_______ cross the road before the traffic lights turn green .
| A．Not | B．Won’t | C．Don’t | D．Doesn’t |
---- _______ you ______to the United States ?
-----No , never , but I went to Canada a few years ago.
| A．Have ...been | B．Have..gone |
| C．Did …go | D．Will… go |
Let’s _______ a talk about learning Chinese .
| A．had | B．having | C．to have | D．have |
----Is that a new car?
----No, I _____ it two years ago.
| A．have | B．buy | C．have had | D．bought |
His parents told him not ________.
| A．be late | B．to late |
| C．to be late | D． be to late |