请用所给单词的正确形式填空These data ________ valuable when planning monitoring programs.（be）
举一反三
- 请用所给单词的正确形式填空They were quarrelling about the property their father had left them when he _________.（die）
- 请用所给单词的正确形式填空To go there on Monday ________ pointless ----there’s a public holiday.（be）
- 请用所给单词的正确形式填空Sitting and talking to old friends ________ a pleasant way to spend an evening.（be）
- 请用所给单词的正确形式填空Selfishness is the one of her many faults which _________ itself.（defeat）
- 请用所给单词的正确形式填空Joan is one of those people who ________ out of their way to be helpful.（go）