When and where this took place _____ still unknown.
| A．is | B．has | C．were | D．are |
The rescue team __________ 15 countries has come to aid..
| A．consists of | B．is made up of | C．consisting of | D．make up |
Studies show that people are more __________ to suffer from back problems if they always sit before computer screens for long hours.
| A．likely | B．possible | C．probable | D．sure |
At last the soldiers reached ______the locals called the Golden Triangle.
| A．that | B．where | C．what | D．when |
--- What is that wonderful smell?
--- Our neighbor ________ for a party.
| A．have prepared | B．is preparing | C．prepare | D．will prepare |
_______ you have got such a good chance, you’d better make full use of it.
| A．Now that | B．Although | C．As soon as | D．Even if |