1.i don' t/doesn't) understand this point of grammar.i with i understand) it /better) . 2. linda said: " i am going to have a nap this afternoon". 3.last year we /-/the) st.paul's cathedral and /-/the)tower. 4.money to have) always been the main source of living. 5.my sister (can) score better in the test if the teacher explain) the grammar once more.but the teacher was too busy. 6.there was /an) /on/above) the table. 7.if you stay in the /too/to) long , get) sunburnt. ))