193. What they need at present _______ science and technology.
______ the beginning of the meeting, we heard a report by Mr Li.
It’s getting late. We must "be off" now. Which of the following can’t replace the underlined part?
----- The flower is beautiful. ----- _________.
----- Are you going there with them? -----If you go, ________.
There is _____ a pen, an eraser and some pencils in her pencil-box.