____ Chinese are learning English for a better future.
At times the balance in nature is ______, resulting in a number of possibly unforeseen effects.
Congratulation! It seemed that our boss was ______ with your work today.
The boy lay on his back, with his teeth ______ and his glaring eyes ______ straight upward.
_______ in the leg made it impossible for me to walk as fast as usual.
I had great difficulty ______ the suitable food on the menu in that restaurant.