“I’m glad Adi’s academic performance has greatly improved this semester.“I bet, he …….. hard for that.”
A. Should have worked
B. Has to work
C. Must have worked
D. Would work
E. Ought to have worked

Jawaban: C
“I’m glad Adi’s academic performance has greatly improved this semester.” (Saya senang kemampuan akademik Adi meningkat semes ter ini.) “I bet, he …….. hard for that.” (Dia pasti berusaha keras) Untuk menyatakan pasti yang terjadi pada waktu lampau → must have V3 (must have worked).






