11. He is not good at English, so it is not easy for him to make himself ______. A: understand B: understanding C: understood D: understands

He finally made himself ______. A: understand B: understood C: understanding D: to understand

If I cannot make myself ______ English，I will speak Chinese． A: understood with B: understand with C: understood in D: understand in

When speaking in public, __________. A: speech should be understood B: speech should be easy to understand C: one should make himself understood D: one should make listeners understand

Only then _______ what he really meant when he said “ You left something here.” A: did I understand B: I understood C: understood I D: did understand I