Had Tom studied harder, he ________ the exam.
| A．must have got through | B．would have got through |
| C．would get through | D．could get through |
The ability _______ an idea is as important as the idea itself.
| A．expressing | B．expressed | C．to express | D．to be expressed |
Some insects _______ the colour of their surroundings to protect themselves.
| A．take in | B．take off | C．take on | D．take out |
Always read the ________ on the bottle carefully and take the right amount of medicine.
| A．explanations | B．instructions | C．descriptions | D．introductions |
--- Students should try to do a little studying every evening throughout the term, rather than study all night during the week before the exam.
--- Exactly. ____________.
| A．Practice makes perfect | B．The early bird catches the worm |
| C．Slow but sure wins the race | D．Delays are dangerous |
The big house was burnt down in the big fire, nothing ________.
| A．remained | B．left | C．was remaining | D．leaving |