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 |
I have offered to work for the store owner _____ one night’s stay.
| A．in place of | B．in exchange for | C．in relation to | D．in preference to |
—Why didn’t you tell him about the meeting?
—He rushed out of the room_____I could say a word.
| A．before | B．until | C．when | D．after |
His letter was so confusing that I could hardly make any ______ of it.
| A．explanation | B．meaning |
| C．sense | D．guess |
The nutrients in _____falls into the ocean quickly become available to other living creatures.[来
| A．whatever | B．whichever | C．that | D．wherever |
As we all know, Lost in Thailand is a very successful movie, the cost of ______ is only 30 million yuan.
| A．which | B．that | C．whose | D．whom |