_______, or you’ll fail the exam.
A. Studying hard B. Study hard C. To study hard
This house is __________ for a family of five ___________.
| A．big enough; to live |
| B．big enough; to live in |
| C．enough big; live in |
| D．enough big; to live in it |
---Why not stop __________ a rest?
--- Oh, it’s so exciting that I can’t stop ____________ the model plane.
| A．having; making | B．to have; to make |
| C．having; to make | D．to have; making |
Don’t leave the tap ________ after washing hands.
| A．on | B．open | C．closed | D．off |
The computer still works well, we _____ buy a new one at the moment.
| A．have to | B．must |
| C．don’t have to | D．don’t need |
--When ___________ your brother ___________ his hometown?
---He ____________ for nearly three years.
| A．has, left; has been away |
| B．did, leave; has left |
| C．has, left; has left |
| D．did, leave; has been away |