The teacher has a(an) ___________ to get off topic; sometimes it is difficult for students to make out what he is saying.
| A．concern | B．determination | C．intention | D．tendency |
A group of children are looking into the box, ____ about what can be inside.
| A．curious | B．worried | C．careful | D．sorry |
I must be off now. My friends ________ outside.
| A．wait | B．have waited | C．are waiting | D．were waiting |
David is a great teammate. He knows well how to work with __________.
| A．both | B．other | C．another | D．others |
I was about to walk over to Tom’s seat when he ____ and left.
| A．got up | B．tuned up | C．kept up | D．came up |
Please do not feed the fish; they _____ die if they eat too much.
| A．shall | B．must | C．need | D．may |