A serious study of physics is impossible________some knowledge of mathematics.
Helen was much kinder to her youngest child than she was to the others,,of course,made the others jealous.
is known to us is that tobacco contains nicotine and other harmful products,so you should give up smoking.
——Which of the two souvenirs do you like better? ——blue one.of course.I think it's reallymost instructive one.
—When are you leaving for Guangdong? —My planeat six.
well prepared you are,you still need a lot of luck in finding a suitable job.