---You may find the key to the maths problem on page 107 .
---Ah, it’s so simple . I wonder why I of that .
| A．hadn’t thought | B．haven’t thought |
| C．didn’t think | D．wasn’t thinking |
Charles entered New York University in 2009 and one year later to University of London as an exchange student
| A．sent | B．had sent |
| C．was sent | D．had been sent |
The room he has just rent is about 9 meters length and 3 meters wide．
| A．in | B．on | C．to | D．at |
－The fire in the supermarket last night was terrible !
—They have taken some measures to prevent it occurring．
| A．must | B．will | C．would | D．should |
Tom's worry is he won't be chosen for the school football team．
| A．that | B．whether | C．when | D．why |
The children's excitement as Christmas drew near．
| A．grows | B．tried | C．trying | D．had grown |