There are altogether eleven books on the shelf, ______five are mine.
| A．on which | B．in which | C．of which | D．from which |
_______ your letter, I am pleased to tell you that you are to receive the answer by the end of this week.
| A．Concerned about | B．Concerning | C．Concerning with | D．Concerned |
Yao Ming is easily _______ in the crowd because he is very tall.
| A．to pick up | B．to pick out | C．picked up | D．picked out |
Qingdao is _______ most beautiful coastal city and I think I’ll go there for ______ second time.
| A．a, a | B．the, a | C．the, the | D．the, a |
—Be seated, please and I’ll make you a cup of tea.
—_________. Let’s come to the point first.
| A．You needn’t do so | B．Please don’t bother |
| C．You are welcome | D．You are indeed too polite. |
—I wonder why the thinnest plastics bags, though ________ , are still in use here.
—Well, it’s no easy job to solve this problem effectively.
| A．banning | B．banned | C．to ban | D．having banned |