According to the passage, when are children first expected to study hard？A．Before 6 years

According to the passage, when you have got off a bus or tram and Want to cross the road,

According to the passage, authorship is important when ______A．practical or impractical su

Which of the following is true according to the passage？A．Americans shake their hands when

According to the passage, when bored, people usually______.A．trigger less brain activityB．

According to the passage when people are doing la

According to the passage when small children wer