It’s very convenient ______ us to buy train tickets now because we can buy them either from the station or on the Internet.
I know this plan is far from perfect. But I really can’t think of ______one.
I really found it difficult to read, for his eyesight was beginning to________.
----What are you busy doing these days? ----I______ study for the coming exam.
----You needn’t take an umbrella. It isn’t going to rain. ----Well, I don’t know. It_____do.
I don’t believe him, we_______before. But I have to say you do look so familiar.