问答题Helen is twenty years old, and her age is four times as much as Mary’s. When Helen’s age is twice as much as Mary’s, how old is Helen then?
点击查看答案
填空题When the kids help Kerri Paquette cook, they learn math and science at the same time.____
单选题The Garbage Record Book, as a part of the ship’s official logbook, shall be kept on board and preserved for a period of （）A 3 years after making the first entryB 2 years after the last entryC 3 months after last entryD 3 years after the last entry
单选题According to the passage, which of the following is TRUE?A Freedman and his colleagues hired 400,000 Americans to collect data.B About four hundred thousand Americans worked for Freedman's team full time for 13 years.C People who took part in Freedman's research are about 50 to 70 years old.D People who are 50 to 70 years old seldom drink coffee
单选题Which of the following sentences is INCORRECT?A His father has been dead for six years.B His father died six years ago.C It’s six years since his father had died.D It has been two years since his father’s death.
单选题209-Conversation 2 What ages is the computer game suitable for? A Eight to thirteen.B Under eight.C Over thirteen.
问答题Four years ago, Jane was twice as old as Sam. Four years on from now, Sam will be 3/4 of Jane's age. How old is Jane now?
