scientists have learned a lot about the universe, there is much we still don't know.
| A． | Once | B． | Since | C． | Though | D． | Unless |
The girl ___on the ground ___to me that she had ____the book on the shelf.
| A．lying; lay; laid | B．lay; lied; laid |
| C．lying; lied; laid | D．lie; lied; lay |
______himself to his research on the IT technology, he soon made a breakthrough.
| A．Devoted | B．Devoting | C．Devote | D．To devote |
_____the cause of the oil leaks, the specialists can not draw a conclusion before completing a thorough and detailed investigation.
| A．With regard to | B．Regardless of |
| C．In response to | D．In spite of |
-–What do you think of the lecture?
--____but interesting, but I’ve managed to survive it.
| A．Nothing | B．Everything | C．Anything | D．Something |
English teachers are supposed ______their students a test in class, even after class, ______better teaching results.
| A．to give; ensuring | B．giving; to ensure |
| C．to give; to ensure | D．giving; ensuring |