Thebackgardenofourhousecontainsalawn，____verypleasanttositoninsummer.
A、whichisA
「句意」 我家的后花园有一片草坪，夏天坐在上面会令你心旷神怡。
「难点」 which 引出非限制性定语从句，在句中作主语，且和sit on 构成动宾关系。类似的句子有：This room is comfortable to live in 这句中 live in 和 this room 构成动宾关系。
“What courses are you going to do next semester”
“I don ’t know. But it’s about time _____ on something.”
____ you were busy, I wouldn’t have bothered you with questions.
At ______, photography is a chemical process, during which a light-sensitive material is altered when exposed to light.
患者男，40岁，2周来右侧咬物不适，冷水引起疼痛，近2日来夜间疼痛，影响睡眠，并引起半侧头痛，疼痛不能定位，检查右侧上、下磨牙面均有深的龋洞。对患牙的应急处理为
If you _____ in such a hurry,you _____ sugar into the sauce instead of salt.
