Jane _____ these families of chimps for many years and helped people understand how much they behave like humans

Sunglasses will _____ your eyes from sunlight.

Can Lihua help me with my English?　　　　- I regret to tell you her English is________ yours.

It was not long before their decision not to lend himanything ever again was _____the test

What do you think of Tom? I want to recommend him ____ my manager—— Not bad