Question

1.----I don`t know ____Tom will come this afternoon. ----I`m sure he won`t.He has后面还有

1.----I don`t know ____Tom will come this afternoon.
----I`m sure he won`t.He has to look after his sick sister at home today.
A.where B.why C.if D.that
2.----Who did the work____,Kate,Lisa or Lucy ?
----Lucy did
A.carefully B.most carefully C,the more careful D,more carefully
3.I think I`m ____enough to cook by myself,
A.young B.strong C.old D.smart
4.i was ____ at home
A,lonely B.alone
如果可以说理由，请你们尽量说理由|！谢谢！

Answer 1

1、C，if 是否的意思，我不确定他是否会回来。
2、B，三个人比较，用最高级。
3、C，表示年级大小。我已经够大了，我能自己做饭了。
4、B，alone可作副词或形容词， 只作表语，不能作定语；而lonely只能作形容词，在句中充当定语或表语。be alone at home，此处alone用作表语。

追问

if 不是用于肯定句么？为什么在这个句子会用上呢？

追答

if用两种用法，一作“如果、假设”用，引导条件状语从句。
二作“是否”讲，与weather可互换，用在定语从句中。

Answer 2

1.C
2.D
3.C
4.B