课时跟踪检测(十四) astronomy: the science of the stars ⅰ.单项填空 1．— ________ things are not so bad as they seem. — oh, i'm sure.so we stick to it. a．cheer up！ b．well done! c．congratulations! d．so what? 2．that's really a ________ problem; no wonder all the students looked ________. a．puzzled; puzzling b．puzzled; puzzled c．puzzling; puzzling d．puzzling; puzzled 3．(2013•淄博一中高三检测)recently a kind of industrial glue which is ________ to people's health has been found in some medicine.
