Health experts up to 18 people for possible exposure to Ebola（埃博拉）, Five students after coming into contact with the patient, Dallas officials said．
| A．observed; are monitoring |
| B．observed; have been monitored |
| C．have observed; were monitoring |
| D．were observing; were being monitored |
A total of 264,302 people in the country were reported __________ with HIV by the end of last September.
| A．to have been infected | B．to be infected |
| C．to having been infected | D．to have infected |
The Premier says that bilateral relations will grow smoothly and steadily _____ both countries follow the principle contained in the joint documents.
| A．as far as | B．though | C．unless | D．as long as |
We were aware that, _____, the situation will get worse.
| A．if not dealing with carefully | B．if dealt not carefully with |
| C．if not carefully dealt with | D．if not carefully dealing with |
No matter how _____, you can find something animate, a kind of plant, an animal or human being.
| A．may a desert be dry | B．a desert dry may be |
| C．dry a desert may be | D．a desert may be dry |
__________ her way through the excited crowd in the bookstore, the woman writer is surrounded by a group of admirers.
| A．To make | B．Having made | C．To be made | D．Making |