$11.$ I asked Tam If she wanted to visit the Great Wall in china.
$12.$ The boys said that they had to try their best to win the match.
$13.$ He asked Mary If she could lend him some money.
$14.$ Hung said that he often went to English speaking club at weekend.
$15.$ The teacher asked his students to study hard for their entrance exam.
$16.$ I advised Peter not to spend too much time on playing games.
$17.$ The fishermen said that they were keen on setting out to sea again.
$18.$ Lan told me that she was waiting for her parents then.
$mien$