This cake is very sweet. You _____ a lot of sugar in it.
| A．should put | B．could have put | C．might put | D．must have put |
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 |
The world’s population has grown _____ it was in 1800.
| A．six times more than what | B．more than six times what |
| C．six times more than which | D．more than six times that |