In communication, a smile is usually ___ strong sign of a friendly and ___ open attitude.
We do have the most supportive parents and teachers, ________will make a difference to our study, unless all of us make every effort .
Only when __________ senior high school __________ to show a great interest in poems.
---Why are you still here? Everybody has gone to attend the lecture by the president. --Oh, I ___________ about it!
Mr. Duncan raised an unnecessary question __________ he then failed to find an answer.
—What do you think of his speech at the court? —Er..., sorry, I ________ about something else.