Scientists are convinced ___________ the positive effect of laughter ___________ physical and mental health.
| A．of; at | B． by; in | C．of; on | D．on; at |
It never occurred to me _____ you could succeed in persuading him to change his mind.
| A．which | B．what | C．that | D．if |
According to scientists, our mental abilities begin to _______ from the age of 27 after reaching the highest level at 22．
| A．decline | B．differ | C．fail | D．shrink |
—Peter, this is Laura, a student from No. 2 Middle School.
—How do you do? I’m very delighted to make your _______.
| A．identification | B．acquaintance | C．register | D．currency |
I’m not sure how much scholarship you will receive, but it will roughly ___ your major expenses.
| A．swap | B．abolish | C．settle | D．cover |
Student loan is supposed to provide financial support for people who would ______ not be able to go to college.
| A．otherwise | B．meanwhile | C．therefore | D．nevertheless |