— I’ve told Nancy many times about the meeting, but she still forgot it!
— I understand. Actually, anyone ______ be very forgetful at times.
| A．must | B．should | C．ought to | D．can |
I know Jack spends at least as much time reading as he________.
| A．does writing | B．is writing | C．writes | D．does to write |
It is________ for us to deal with.
| A．an enough difficult situation |
| B．such a difficult situation |
| C．too difficult a situation |
| D．so difficult a situation |
There are ________ books in our school library；however，________ of them are old.
| A．a large number of；fourfifth |
| B．a good number of；fourths five |
| C．the large number of；four fifths |
| D．a large number of；four fifths |
Our government are taking firm measures to make pollution________.
| A．to the end | B．put to an end | C．in the end | D．without end |
________ deep down in the earth，the dead forests rotted away and became coal.
| A．Burying | B．Buried | C．To bury | D．Having buried |