el is heavier than water, why are ships able to on the sea

The girl was nervous in front of so many strangers and we did all we could to make her feel more ____[ ]

The student is _________ see the teacherbecause he_________a mistake.

33．In the reading –room there are tables, you can sit there to read

The state-run company is required to make its accounts as _________ as possible for its staff to monitor the use of the money.