Scientists say it may be one year or so ________ it is possible to test the new medicine on human patients
Can you understand the foreign speaker?— Almost.He ________ his speech with a lot of gestures.[ ]
________ the problem of land erosion(侵蚀) getting more serious, the government is searching for a way to deal with it
There is a crowd of people in front of thehouse over there What do you suppose_____ there
__ as a volunteer teacher in Tibet for a year, Linda has become more experienced.