Many experts agree that once these treasures are _______ to the air, great harm will be done to them. So they think it better not to unearth the treasures.
| A．exposed | B．threatened | C．constructed | D．conserved |
______________ I try to make time to go out and have fun, my grades _____________.
| A．For the first time; trap | B．The first time; count |
| C．Every time when; worsen | D．Every time; suffer |
Adolescents are warned not to ____________ their pimples in case they get scars.
| A．risk squeezing | B．attempt squeezing |
| C．tended to squeeze | D．encourage to squeezing |
There are a number of methods to provide ___________ relief from your toothache pain, which can’t cure the problem.
| A．permanent | B．temporary | C．contemporary | D．consequent |
While reading, Helen has a habit of stopping _____ to give her long and flowing hair a smooth.
| A．occasionally | B．eventually | C．automatically | D．absolutely |
I don’t know how it ___________ that our car was bumped from behind.
| A．let out | B．gave out | C．got about | D．came about |