It is impossible to ________one’s goal without working hard.
To help a friend solve the problem troubling him, .
Not until all the fish died in the river how specious the pollution was.
a reward of $1,000 will be given to can provide any clues to the case which has been investigated by the police for nearly half a year.
—What caused the party to be put off?—_________the invitations.
.—How do you find your new classmates?—Most of them are kind, but is good to me as Bruce.