In fact, smokers know that smoking has a bad ________on their health, but they just can’t stop it.
After school was over the boys ________ their books and went home.
Remember to______ a stamp on the envelope before you post it.
The nurse gave ________ the sweets to the children.
Yesterday the president spoke on TV to the _______.
The students are well _______ the exam. They are sure to get good marks.