Câu 1: Let's ________a walk in the park for fun now. 1. have 2. take 3. go 4. do Câu 2: Last Sunday we arrived at the waterfall nearby _______ 7.00 a.m. 1. on 2. in 3. if 4. at Câu 3: The students can_______any words in this dictionary if they don't know their meaning. 1. look for 2. look after 3. look up 4. look at Câu 4: The doctor advised my uncle to stop _______ because it’s quite harmful to his health. 1. to smoking 2. smoking 3. smoke 4. to smoke Câu 5: The doctor advised my uncle to stop _______ because it’s quite harmful to his health. 1. to smoking 2. smoking 3. smoke 4. to smoke