If he ___ harder, he will get good grades.
A: works
B: work
C: working
D: will work
A: works
B: work
C: working
D: will work
举一反三
- He（） for an IT company. A: work B: works C: working
- If he hard, he will get good grades.
- He saw her ________ in the garden. A: work B: worked C: working D: works
- It is high time that we encouraged our students ________ harder A: working B: work C: to work D: works
- He is a good partner so I have a good time ______ with him. A: to work B: work C: working D: having worked