___ is really hard ___ them to climb Mount Tai.[ ]

Were you sick after six hours’ journey ?——Of course. I __________ quickly as soon as it stopped.

Let’s vote____ Betty, because she often helps people ___ need.[ ]

It’s clear__________ that a hard working student has___________ a great interest in science.

Jerry ________ with a stranger when I met him on the way to work yesterday.