The medicine works more effectively ______ you drinksome hot water after taking it

Does the old man know the museum very well? —No, this is the first time he __________ here.

Kathy _________ a lot of Spanish by playing with the native boys and girls.

We won’t be able to learn English well _____we learn enough words by heart and do enough reading[ ]

I’ll take seriously ___________ advice you put forward.