In the global economy，a new drug for cancer，________it is discovered，will create many economic possibilities around the world.
| A．whatever | B．whoever | C．wherever | D．whichever |
—You may find the key to the math problem on page 107.
—Ah, it’s so simple. I wonder why I _____ of that.
| A．hadn’t thought | B．haven’t thought | C．didn’t think | D．wasn’t thinking |
A turning point of the continuously high housing price won’t appear suddenly because there must be a certain process _____ many factors lead to the change.
| A．which | B．what | C．where | D．that |
—Have you understood what he really means?
—___________.
| A．Now and then | B．More or less | C．From time to time | D．Here and there |
—I’m driving to Beijing after breakfast.
—Take care,with all this fog.
| A．especially | B．mainly | C．extremely | D．really |
______ providing entertainment, the website also turns out to be a helpful learning tool.
| A．Far from | B．Apart from | C．Instead of | D．Regardless of |