As a senior high student, you should your energy on how to master the skills of learning.
| A．impress | B．spend | C．concentrate | D．use |
Actually, Miss Zhang is not at all serious as she _____.
| A．shows | B．performs | C．appears | D．behaves |
We need to wear sunglasses to ____ our eyes from the sun.
| A．stop | B．prevent | C．save | D．protect |
The boy's bad behavior ____ his mother lots of sleepless nights.
| A．cost | B．took | C．spent | D．paid |
. He ____ to help me with my math, but I refused his help, for I decided to do it on my own.
| A．prepared | B．ready | C．insisted | D．offered |
The short play put on last night did ____ large audiences.
| A．take | B．allow | C．draw | D．admit |