根据中文提示,用词组的适当形式填空 。
(1)Hurry up!We are ____ (等候)you at the gate.
(2)He was so tired that he ____ (入睡)as soon as he lay down.
(3)Michael is____ (擅长)physics but he is weak in chemistry.
(4)Li Lei seldom goes to school ____ (步行).He usually takes a bus there·
(5)A lot of trees were ____ (砍伐).As a result,there were more sandstorms.