—How long do you want me to heat the oil?

—Heat it till it ________ to smoke.

A．would begin 

B．begins

C．will begin 

D．began

—How long do you want me to heat the oil?

—Heat it till it        to smoke.

    A．would begin  B．begins   C．will begin   D．began

—How long do you want me to heat the oil?

—Heat it till it       to smoke.

1. A.
   would begin
2. B.
   begins
3. C.
   will begin
4. D.
   began

—How long do you want me to heat the oil?

—Heat it till it        to smoke.

    A．would begin  B．begins   C．will begin   D．began

— How long do you want me to heat the oil?

— Heat it till it ______ to smoke.

A. would begin　 　　　 B. began　　　　 　　 C. will begin　　　 　　 D. begins

—How long do you want me to heat the oil?

—Heat it till it ____ to smoke．

　　　 A．would begin 　　 B．began　　　　　　 C．will begin　 　　　　 D．begins

—How long do you want me to heat the oil?
—Heat it till it       to smoke.