一 Have you finished your homework yet? -- No, not yet. I think it'll take me half an hour.
Would you mind me how this physics problem ?
. —I think Mr Zhang may be in his office. —No, he be there. I saw him just now.
—What do you think of the new bridge? —I have never seen _____ before.
. —A new shop ________ for a week nearby. Let's go and have a look. —Great idea. But I'm told it doesn't __________ on Mondays.
“Underground” is the only word in the English language _______ begins and ends with the letters “und”.