按照句子结构的语法性，在下面空格处填入一个适当的词语或使用括号中词语的适当形式填空
小题1:Unless _________ (invite), I won’t attend their wedding.
小题2:We spent an ___________ (enjoy) weekend.
小题3:He noticed all the room ____________ (break) into at the case spot.
小题4:Your graduation paper must ____________ (submit) by 10am.
小题5:She is really a __________ (gift) biochemist.
小题6:Hardly had she arrived home ________ it began to rain heavily.
小题7:At first, she worked as an ____________ (assist) to a famous journalist.
小题8:After the film was over, people went home ___________ all directions.
小题9:If you don't go swimming tonight, __________ will I.
小题10:The child held his mother’s arm _____________ (firm) when he saw her.
小题11:Those books ____________ (buy) on the Internet are usually best-sellers.
小题12:We must be strict ___________ ourselves.
小题13:_____ seemed that the water was to blame.
小题14:I find it difficult ____________ (learn) English well.
小题15:Doctors are trying a new ________ (treat) for cancer.
小题1:invited
小题2:enjoyable
小题3:broken
小题4:be submitted
小题5:gifted
小题6:when
小题7:assistant
小题8:in
小题9:neither/ nor
小题10:firmly
小题11:bought
小题12:with
小题13:It
小题14:to learn
小题15:treatment
小题1:invited非谓语动词。 Invite 与主语I之间是被动关系，完整的句子为Unless I am invited, I won’t attend their wedding.
小题2:enjoyable 意为我们度过了一个令人愉快的周末。
小题3:broken 此处为宾语补足语。修饰room。房间跟break之间是被动关系。
小题4:be submitted 毕业论文跟上交是被动关系。
小题5:gifted一个有天赋的生物化学家。
小题6:When固定搭配 hardly ……when……一……就……
小题7:assistant助手
小题8:in固定搭配in all directions 意为四面八方地，各个方向地
小题9:neither/nor 用neither或者nor的倒装结构表示也
小题10:firmly修饰动词hold用副词
小题11:bought 此处bought做定于修饰书，完整句子应为Those books which are bought on the Internet are usually best-sellers.
小题12:with 固定搭配 对……严格
小题13:It 形式主语，真正的主语是that the water was to blame.
小题14:Be difficult to do sth 句型
小题15:treatment 此处应当填名词