—Sorry, I’m late for work.—Is that ________ you got stuck in a traffic jam again?
—You may find the key to the math problem on page 107.—Ah, it’s so simple. I wonder why I _____ of that.
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.
—Have you understood what he really means? —___________.
—I’m driving to Beijing after breakfast. —Take care, with all this fog.
______ providing entertainment, the website also turns out to be a helpful learning tool.