单选题 Prices of daily goods ______ through a computer can be lower than store prices.

单选题 If I ___ the advertisement before,I would have signed up.

单选题 The systems remain basically the same as ______ in use half a century ago.

单选题 She began to play table tennis ,and became famous.

单选题 Xi an is a good place to visit.____ you ever ____ of the terracotta warriors.

单选题 I ______ a shower when you called me yesterday evening.

单选题 The family will have a picnic if it ______ fine next Sunday.

单选题 His understanding made a deep impression ______ the young girl.

单选题 The team needs to ______ a new strategy to meet the deadline.