The field research will take Joan and Paul about five months; it will be a long time _____ we meet them again.
—How about your sister’s studies?—Oh,she is_________ very well in her studies.
It_________ to me that I should pay a visit to my friend Jane.
.She listened to the music with her face_________ in tears.
—Have you been here long?—_________.
—Shall I invite Tom to my party?—Yes,it will be nice if you_________.