用所给动词的适当形式填空3.Be careful with such things.If you________(not
用所给动词的适当形式填空
3.Be careful with such things.If you________(not be),you'll drop them.
4.The construction of this building started two years ago,but it________(not complete) so far due to various reasons.
5.Fortunately,the little girl________(survive) the aircrash,but unluckily,the others on the flight were killed.