English will help us ______ in our work and study.
—Shall we stop for lunch _______ shall we drive on?—Let’s stop for lunch, but the driver can’t drink _______ drive.
Guilin is ___ attractive city. It’s ____ nice place that many tourists go there every year.
_______, when Marx was already _______, he found it was important to study the situation in Russia, so he began to learn Russian.
Where is Linda? I can’t find her anywhere. She ______ the flowers in the garden.
If we ______ take environmental problems seriously, the earth _______ worse and worse.