金属的机械性能是指在一定温度条件和外力作用下，抗拉变形和断裂的能力，如强度、塑性、硬度、冲击韧性，加工性能即冷塑性变形和可焊性等。
正确
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Wecan____thetwoislandswithabridge.
It’shightimewe_____cuttingdowntherainforests.
Arrivingatthebusstop,_____waitingthere.
Thebeachisinanideal（）todrawtourists.
Marytiptoedoverandtooktheclockawaybecauseshehatedtohearit（）whenshewastryingtogotosleep.
