21.Here’s one of the best ways to protect your skin—_____ too much sunshine.
| A．not to absorb | B．not having absorbed |
| C．having not absorbed | D．don’t absorb |
This is the reason _______ he gave me.
| A．why | B．for which | C．which | D．because |
Your composition is good _______ some spelling mistakes.
| A．except | B．except for | C．beside | D．besides |
Dark glasses can _____ your eyes ______ the sunlight.
| A．prevent; from | B．save; from | C．stop; from | D．protect; from |
We didn’t have much difficulty _______ the company.
| A．found | B．to find | C．in finding | D．find |
I'll never forget the day _________ I was born．
| A．when | B．that | C．on which | D．both A and C |