Scientists are convinced _____the positive effect of laughter _____physical and mental health．

The director will by no means turn the actress away        all she is considered the most qualified for the role．

I never saw him,        I can remember, reading anything but newspapers.

In a natural disaster, minutes and even seconds of warning can make the         between life and death.

—Mike, you don't seem to be quite       today.
—Well, I hardly slept last night. I was preparing for a report.

---I will not come here tomorrow.
--- It makes no ______ to me, because I don’t care.

I was really too busy with my homework and I couldn’t help ____ the housework.

To________ telling lies, he asked his friend to help him cheat his parents.

The Chinese language differs from Western languages ______, instead of an alphabet, it uses characters which _______ ideas, objects or deeds.

Eating too much fat can______heart disease and cause high blood pressure.
Which is wrong?