He visited the Effel Tower, which __________to 1889, during his stay in France last summer.
| A．dated back | B．dates back |
| C．has dated back | D．has been dated back |
Though _______ with the present situation, the local government could not find effective measures to reduce the risk of coal mine accidents.
| A．unsatisfied | B．being unsatisfied | C．unsatisfying | D．to be unsatisfied |
Bill’s aim is to inform the viewers that cigarette advertisements on TV are illegal, _______?
| A．isn’t it | B．is it | C．aren’t they | D．are they |
—How much do you know about the 3D film technology?
—A little. Not until _______the hot movie Avatar _______ some about it.
| A．did I see; did I begin to learn | B．I saw; I began to learn |
| C．I saw; did I begin to learn | D．did I see; I began to learn |
--- Hurry up! Alice and Sue are waiting for you at the school gate.
--- Oh! I thought they ______ without me.
| A．went | B．are going | C．have gone | D．had gone |
She hasn’t had time to travel around ______ she started her new job.
| A．since | B．but | C．yet | D．however |