THE BUS CAME AFTER HE ... THERE FOR ABOUT TWENTY MINUTES.A. STANDI...

44. - 3500 CAU TRAC NGHIEM ON TAP AV THCS
3500 CAU TRAC NGHIEM ON TAP AV THCS

44. The bus came after he ... there for about twenty minutes.

a. standing

b. stand

c. was standing

d. had been standing

 d