______ you eat the correct foods ______ be able to keep fit and stay healthy.
| A．Only if; you will | B．Unless; you will | C．Only if; will you | D．Unless; will you |
“How long will you work on the farm?” “____ the end of next year.”
| A．In | B．By |
| C．At | D．Since |
“When did you become an actor?” “_______ 1995, when I graduated from college.”
| A．After | B．In |
| C．From | D．Since |
4. “How long have you been an actor?” “_______ 1995, when I graduated from college.”
| A．After | B．In |
| C．From | D．Since |
Sometimes our opinions differ _______ what we choose to observe and how we deal with what we’ve observed
| A．which | B．since |
| C．because | D．because of |
The writer is not satisfied with _______ buses are too crowded.
| A．that | B．which |
| C．what | D．the fact that |