Question

B，C两大题！！！！！

Answer 1

追答

第三个是is watching

追问

为什么B，2是was having，B.3是is having

追答

已经发生的事用过去进行B3也可以认为是过去也可以用过去进行时这个看个人理解

追问

C，3可以是of呜？

追答

C3只能是in 固定搭配

注意区分in a low voice
at a low price/speed

还有不懂的吗

Answer 2

1, useful
2, was having telephoned
3, is watching / am making
4, chatting
5, Were doing / wasn't / was reading
6, interested
7, collect

追答

1, at ( on)
2, with
3, in
4, against
5, on
6, for
7, of

认真解答，确保正确，欢迎追问。

追问

为什么B，2是was having，B.3是is having

追答

感谢内行网友们采纳。