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

She hired a lawyer to investigate, only to learn that Gabriel had removed her name from the deed.The infinitive verb phrase “only to learn ” is used ____.

Arriving at the bus stop, _____ waiting there.

If only I _____ play the guitar as well as you!

Thebackgardenofourhousecontainsalawn，（）verypleasanttositoninsummer.