1I telephoned Jane just now,but she wasn’t in. I has to leave her a(n) _______.

Remove the batteries when they become weak or when the unit is not in use for extended periods. This will damage to the unit from battery leakage at such times.

There’s no doubt ________ international cooperation is the key to ______ with cybercrime.(网络犯罪)

We’ll go for a picnic if it _______ thisweekend.

ou try, it is difficult to loseweight without cutting down the amount you eat.