It is often said that ____teachers have _______very easy life.
A /,/ B. /,a C. the,/ D. the, a
Measures have been taken to prevent accidents, but much ______ for more improvement.
| A．remains to be done | B．is remained to do |
| C．remains to do | D．is remained to be done |
. As we all know, it was ______ that resulted in the terrible car accident.
| A．because of her carelessness | B．for her to be careless |
| C．because she was careless | D．her being careless |
What ______ during a person's early years may affect the rest of his life.
| A．happened | B．has happened | C．happens | D．happening |
---You won’t go to Mary’s wedding party, will you?
---Yes, ______ invited to.
| A．even if | B．if | C．unless | D．though |
The plastic flowers look so ______ that many people think they are real.
| A．natural | B．familiar | C．beautiful | D．similar |